The Bookmark Manager Tool 
can be found in the tool bar and also in the View menu. Once this tool is activated it will open the Bookmark which is identical to the open used in the normal (2D) views.
By using this manager, actual positions within the 3D view can be saved with names and can be retrieved to be used within the same 3D view or others views defined within the project. These bookmarks however, are kept separate from those saved from within the 2D views.
